What are these transmission codes and how do I make the repairs?

I have a 2003 Dodge Intrepid 6 cylinder 2.7 ltr. - from reading the internet - this transmission problem seems like a fairly common problem with this car. Lots of complaints online, but NO resolutions. (Not that I've found)

History:

When slowing into a lower speed the transmission "limps in" (goes into a lower gear) the RPM's will rev up past 5 (x1000) if I attempt to go any faster than 45mph. A quick fix is to pull over, turn the car completely off and then restart the car then I'm good until it "limps-in" again the next time I have to slow.

Also, when the vehicle is "cold" and I put it into a gear (either forward or reverse) it revs up like it has to "catch", then jerks into gear and goes.

I took the car to an auto shop and they put it on their computer and it came up with the following codes:

PO841 - Low and Reverse clutch Pressure Switch Circuit
PO871 - Overdrive Hydraulic Pressure Switch Circuit
P1776 - Solenoid Switch Valve (left rear piston)

the mechanic at this shop said that they don't do these repairs but gave me some information on a place that does.

Before taking it in I have a few questions:

What kind of repairs am I looking at?

Are these sensors?

Or Is this something that will need to be done in a "re-build'?

Is this something that I can do on my own? (I am fairly capable when it comes to replacing or exchanging minor parts like belts, hoses, brake pads, rotors, radiator, alternator, starter - etc....)

Thanking everyone in advance!

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Submitted 139 days ago...

obsessedhod

Beginner (35)

Thanks Dr. Know -

I was able to download a free Transmission Manual online for the 41TE Transmission - BUT THE TRANSMISSION IN THE 2003 Intrepid SE 2.7ltr is a 42LE - they are extremely similar usually in the same repair manuals together and both styles have the same codes so I feel confident in the diagnosis.

Luckily, all of the codes are related to the SAME PART. The Diagnostic and Information Procedures for all of these codes recommends the repair to be: "replace the Pressure/Solenoid Switch Assembly.

Since there are so many of these problems I am posting what i was able to find out. Maybe this info will help others and save them time and energy! I invested about 7 hours just searching through all of the online questions and answers....

CULPRIT:

Pressure/Solenoid Switch Assembly

NEW COST:

$200 on Ebay (new in package includes S&H) - MOPAR brand
$259 at Dodge Dealer - MOPAR brand

TIME TO REPAIR:

A capable technician should be able to do the repair in approx. 2 hours. The transmission does not have to be removed, only the valve body (which the solenoid pack sits on). So expect to spend anywhere from $120+ (most competent mechanics will charge $60/hr+ for labor)

NOTE: I personally don't feel 100% confident making these repairs on my own. The screws must be torqued to a specific range, and the valve body must be removed in order to even get the solenoid pack, and those screws have to be torqued as well. I am including a diagram w/an actual photo of the transmission with the Pressure/Solenoid Switch Pack in plain view.

I feel that I have educated myself enough on this repair that I won't be taken to the cleaners - neither should anyone else!

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